$(document).ready(function() { $(".ui.form").form({ fields: { email: { identifier: "username", rules: [ { type: "length[5]", prompt: "Your username must be at least 5 characters long." } ] }, password: { identifier: "password", rules: [ { type: "length[6]", prompt: "Your password must be at least 6 characters long." } ] } } }); });